EP3598255A1 - Système pourvu d'opérateurs serveurs et d'opérateurs clients - Google Patents

Système pourvu d'opérateurs serveurs et d'opérateurs clients Download PDF

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Publication number
EP3598255A1
EP3598255A1 EP18183958.0A EP18183958A EP3598255A1 EP 3598255 A1 EP3598255 A1 EP 3598255A1 EP 18183958 A EP18183958 A EP 18183958A EP 3598255 A1 EP3598255 A1 EP 3598255A1
Authority
EP
European Patent Office
Prior art keywords
operator
server
client
servers
image
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP18183958.0A
Other languages
German (de)
English (en)
Other versions
EP3598255B1 (fr
Inventor
Ralf Engert
Markus Hoffmann
Benjamin Lutz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
Priority to EP18183958.0A priority Critical patent/EP3598255B1/fr
Priority to US16/511,690 priority patent/US11140041B2/en
Priority to JP2019131203A priority patent/JP6938573B2/ja
Priority to CN201910642590.0A priority patent/CN110730200B/zh
Publication of EP3598255A1 publication Critical patent/EP3598255A1/fr
Application granted granted Critical
Publication of EP3598255B1 publication Critical patent/EP3598255B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/22—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks comprising specially adapted graphical user interfaces [GUI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/02—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]
    • H04L67/025—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP] for remote control or remote monitoring of applications
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/08—Protocols specially adapted for terminal emulation, e.g. Telnet
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/10—Protocols in which an application is distributed across nodes in the network
    • H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
    • H04L67/1004—Server selection for load balancing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/14—Session management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/50—Network services
    • H04L67/75—Indicating network or usage conditions on the user display
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/10—Protocols in which an application is distributed across nodes in the network
    • H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
    • H04L67/1004—Server selection for load balancing
    • H04L67/1006—Server selection for load balancing with static server selection, e.g. the same server being selected for a specific client
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

Definitions

  • the invention relates to an arrangement with operator servers and with operator clients according to the preamble of claim 1.
  • process objects in the form of measuring points, tanks, valves, sensors, actuators, where a process object has several related facets.
  • a process image stored on operator servers for these process objects includes process image modules or process and operational data of these process objects that are relevant to operation and monitoring, an automation device for automation modules or control modules (CFCs, SFCs, ...) associated with the process objects and also a user Interface of the operator clients picture and / or block symbols of a plant picture belonging to the process objects as well as so-called faceplates.
  • CFCs, SFCs automation device for automation modules or control modules
  • an operator server and an operator client each form an operator system, but the rigid client-server connection increasingly "disappears" through the use of web technologies - especially in process engineering.
  • web-oriented clients can connect to almost any operator server.
  • the process data required for operation and monitoring (process variables, process values, Tags, tag addresses, ...) for dynamizing the system images are made available to the operator client who has logged on to one of the operator servers by the operator server acting as a local server being used by others acting as a remote server Operator servers obtain process data and this local server transmits its process data together with the process data obtained from the remote servers to the logged-on operator client for processing.
  • the local server has to obtain almost all process data required for the opened plant picture from the remote servers in order to update a plant picture.
  • a so-called cross-communication load between the local server and the remote servers increases, the response times and the image opening times deteriorate and, furthermore, the "emergency reserve" decreases on the server side in order to be able to react appropriately in the event of an accident.
  • the invention is therefore based on the object of creating an arrangement according to the preamble of patent claim 1, by means of which an operator is notified of the communication load between the operator servers in the context of updating a system image.
  • the invention is based on the idea of determining how much process data for updating the block symbols on the local operator server - the server to which a client has logged on - and how much such process data on the remote servers - the servers, which feed or provide their process data to the local server are stored.
  • the cross-communication load is between the local one Server and the remote operator servers, because the local operator server first has to obtain all the process data from the remote operator server, and finally all process data - that of the local server and that of the remote server - from the logged-on operator client to be able to transmit.
  • the high cross communication load means an unfavorable client-server connection.
  • the logged-on operator client is shown or informed that a cheaper client-server connection can be established.
  • the operator client is therefore proposed to log on to the remote operator server on which most of the process data is stored, which would reduce the cross-communication load in the event of a login to this remote server.
  • the client-server connection which causes the lowest server communication cross-traffic and thus leads to the lowest server-side load, can be ascertained “plant-image-granular” or “image-individually”.
  • the logged-on operator client reports to one of the remote servers depending on the number of tags or tag addresses of the process image modules after a predetermined period of time or after an operator input Establishment of a new client-server connection, whereby this remote server acts as a new local server after login.
  • This creates a cheaper client-server connection, thereby keeping the communication or cross-communication load between the operator servers low.
  • This is particularly advantageous for system pictures on large screens or for long-standing overview pictures that have to be updated, because in these cases a very high number of block symbols has to be updated. This will, for. B. for exceptional situations, a maximum "emergency reserve" on the server side, and the runtime stability of a process control system is also improved. Special engineering is not required.
  • the client-server connections can be visualized on the registered operator client.
  • an operator is visually informed of a favorable and unfavorable server-client connection, the operator using an operator input to cause the operator client to log on to the operator server with the cheapest client-server connection.
  • FIGS 1 and 2 are designated with PL components of a process control system, which in the present exemplary embodiment is a first operator server 1 (OS server 1), a second operator server 2 (OS server 2), three operator clients 4, 5, 6 (OS client 1, OS client 2, OS client 3) and two automation devices 7, 8 comprises.
  • the process control system PL can of course have a large number of automation devices which are connected on the one hand to the operator servers 1, 2 via a plant bus 9 and on the other hand to another distributed bus (not shown here) with decentralized peripherals (also not shown here). A large number of field devices (sensors, actuators) are connected to these decentralized peripherals.
  • only two operator servers 1, 2 and three operator clients 4, 5, 6 are shown in the present example.
  • the process control system PL can have further operator servers and further operator clients, the operator servers 1, 2 and the operator clients 4, 5, 6 are connected to a terminal bus 10.
  • a process object has several related facets.
  • a process image 11 of the first operator server 1 has a process object or a process object instance 12 of a PID controller and a process object 13 for a motor.
  • a process image 14 of the second operator server 2 is provided with a process object 15 for another motor.
  • the automation device 7 has automation or control modules 16, 17 associated with these process objects 12, 13, and the automation device 8 has automation or control modules 18 associated with the process object 15.
  • the operator clients 4, 5, 6 are each provided with a user interface, which have faceplates and block symbols 19 of one or more plant images belonging to these process objects, block symbols of a plant picture for process monitoring and the faceplates of a plant picture for process control or Process operation are provided.
  • the block symbols show current process values for process variables, parameters and alarm identifications of the process objects during the process control, whereby (target) parameters of the process objects can be entered or changed and / or deleted as part of the process control using the faceplates.
  • the operator client 4, 5, 6, who has logged on to one of the operator servers 1, 2, is supplied with the current process data of the process objects by this operator server, the current process data being supplied by the automation devices 7, 8 to the operator Servers 1, 2 for storage in the process image modules 12, 13, 15 of the process images 11, 14 belonging to the process objects are transmitted.
  • the operator client 5 connects to the second operator server 2 to update block symbols 20, 21, 22 ( Figure 3 ) of a system picture Has.
  • the second operator 2 acts as a local (operator) server and the first operator server 1 as a remote (operator) server.
  • the remote server 1 has the process image modules 12, 13 and the local server 2 has the process image module 15.
  • the local server 2 must first obtain the current process data stored in the process image modules 12, 13 from the remote server 1 in order to finally provide this process data and the process data of its process image module 15 to the operator client 5 or to be able to supply what in the Figure 1 is indicated by a "wide" communication bar 23.
  • This high cross-communication load between the remote server 1 and the local server 2 indicates an unfavorable client-server connection; a connection between the operator client 5 and the remote server 1 would - as will be shown in the following - be considered on the cross communication load the better choice.
  • the operator server acting as a local server determines the number of the on the. For the block symbols from a data structure of the system picture Process data stored on operator servers. It is therefore checked on which of the operator servers most of the process data are stored, and the result of this check is fed to the logged on operator client.
  • the process image module 12 stored on the remote server 1, which is represented on the operator client 5 by the block symbol 20, has three so-called tags.
  • a tag usually includes the address of a process image block of a process object in the process image of a server and an associated process value.
  • the process image module 13 stored on the remote server 1, which represents the block symbol 21, on the other hand, has two tags.
  • the process image module 15 of the local server 2 is provided with two tags, the block symbol 22 being represented by the process image module 15.
  • tags of the process image modules 12, 13, 15 are shown in FIG Figure 3 indicated by reference numerals 20a, 20b, 20c, 21a, 21b, 22a, 22b of the block symbols 20, 21, 22.
  • a user interface 100 of the operator client 5 transmits an instruction 102 to a software runtime component 101 of the local server 2, for example in the form of an instruction "open system image".
  • the software runtime component 101 accesses a data structure 103 of the system image 27 stored on the local server 2, which in the Figure 4 is represented by reference numeral 104.
  • the data structure 103 has so-called screen items, which usually contain the tag addresses of the block symbols, data for identification, Description and positioning of picture objects in the plant image 27 as well as further data required for the representation of the plant image 27 on the respective operator client.
  • the software runtime component 101 of the local server 2 determines or counts the number of tags or the number of tag addresses of the process image modules 11, 12, 14, the software runtime component 101 recognizing in the present exemplary embodiment, that five tags or tag addresses relate to the process image 11 of the remote server 1 and two tags or tag addresses relate to the process image 14 of the remote server 2.
  • the tags or tag addresses are fed to a runtime system which comprises the process image 14 and an event management component 108 of the local server 2.
  • the runtime system 14, 108 is able to transmit the process values stored in the process image modules 11, 12, 14 to the block symbols 20, 21, 22 corresponding to these modules, as a result of which these block symbols with current process values are supplied, the runtime system 14, 108 transmitting process value changes to the user interface 100 (reference numeral 109).
  • the software runtime component 101 recognizes that five tags or tag addresses relate to the process image 11 of the remote server 1 and two tags or tag addresses relate to the process image 14 of the remote server 2
  • Software runtime component 101 of the local server 2 presents the operator client 5 with a new client-server connection (reference symbol 110).
  • the operator client 5 should subsequently log on to the remote server 1, the proposal being displayed to an operator or a user of the operator client 5.
  • this functions as a new local server 1
  • the “old” local server 2 acts as a new remote server.
  • the evaluations relating to the cheapest client-server connection are carried out by a runtime component 111 of the operator server 1 (new local server) and a runtime system of this operator server 1, which comprises the process image 11 and an event management system 112.
  • the local server 2 recognizes that in order to update the block symbols 20, 21, 22 with the current process data, the connection between the operator client 5 and the remote server 1 with regard to the communication load between the servers 1 , 2 is cheapest. In this case, only the few process values of the process image module 15 are to be transmitted to the operator server 1 by the operator server 2 (in FIG Figure 2 by means of a narrow communication bar 25) in order to be able to provide or supply these process values and the current process values of its process image modules 12, 13 to the operator client 5 (in Figure 2 indicated by means of a broad communication bar 26).
  • the local server 2 to which the operator client 5 has registered, notifies the operator client 5 of the cheaper client-server connection or that a cheaper client-server connection can be established.
  • the system image 27 (shown on the operator client 5 ( Figure 5 ), which comprises the block symbols 20, 21, 22, further block symbols, picture symbols for the representation of system components and superimposed faceplates, a symbol 28 is displayed which indicates to an operator that in view of a lower cross-communication load between the servers, a cheaper client-server connection can be established. After a predetermined period of time or after a corresponding operator input on the operator client 5, this cheaper client-server connection is finally established, in both cases the operator client 5 logging on to the remote server 1, which then as a (new) local server acts.
  • a suitable operator input can e.g. B. be accomplished in such a way that the operator actuates or selects the symbol 28 by means of a "mouse", whereby a dynamically compiled connection picture opens in which the current connection situation is shown with the corresponding communication bar and the evaluated and cheaper connection is shown.
  • FIGs 6 and 7 each show such a connection image that can be displayed on the operator client 5, wherein in the following, for the sake of simplicity, Figures 6 and 7 occurring image components representing the operator servers 1, 2 and the operator client 5 are used the same reference numerals.
  • Figure 6 the more favorable connection is indicated to an operator in a connection image 29 by means of a dashed line or an arrow 30, the representation in the connection image 29 naturally pointing to the operator servers 1, 2 and the operator client 5 for the actual connection and proposal connection (dashed line 30) is limited.
  • connection image 29 In the event that the operator decides on the proposed cheaper connection, he can activate it by selecting a symbol 31 in the connection image 29. If the switchover has taken place, which means that the operator client 5 has logged on to the operator server 1, the new client-server connection is shown in a further connection picture 32 ( Figure 7 ) visualized. In the event that the operator selects the symbol 31 again, the operator client 5 logs on to the operator server 2 again and the original connection picture 29 is shown again.
  • the switchover initiated manually by the operator can of course take place automatically, so that, for example, on the basis of a statistical evaluation of the image queuing times of different operators (“how long has which operator opened which image?”), A suitable server selection is already derived when the operator logs on can be.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Human Computer Interaction (AREA)
  • Information Transfer Between Computers (AREA)
  • Computer And Data Communications (AREA)
  • Testing And Monitoring For Control Systems (AREA)
EP18183958.0A 2018-07-17 2018-07-17 Système pourvu d'opérateurs serveurs et d'opérateurs clients Active EP3598255B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP18183958.0A EP3598255B1 (fr) 2018-07-17 2018-07-17 Système pourvu d'opérateurs serveurs et d'opérateurs clients
US16/511,690 US11140041B2 (en) 2018-07-17 2019-07-15 Arrangement with operator servers and operator clients
JP2019131203A JP6938573B2 (ja) 2018-07-17 2019-07-16 オペレータサーバおよびオペレータクライアントを備えた装置
CN201910642590.0A CN110730200B (zh) 2018-07-17 2019-07-16 具有操作员服务器与操作员客户端的装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18183958.0A EP3598255B1 (fr) 2018-07-17 2018-07-17 Système pourvu d'opérateurs serveurs et d'opérateurs clients

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EP3598255A1 true EP3598255A1 (fr) 2020-01-22
EP3598255B1 EP3598255B1 (fr) 2022-01-26

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US (1) US11140041B2 (fr)
EP (1) EP3598255B1 (fr)
JP (1) JP6938573B2 (fr)
CN (1) CN110730200B (fr)

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Publication number Publication date
CN110730200A (zh) 2020-01-24
CN110730200B (zh) 2022-05-17
US20200028751A1 (en) 2020-01-23
JP6938573B2 (ja) 2021-09-22
US11140041B2 (en) 2021-10-05
JP2020013572A (ja) 2020-01-23
EP3598255B1 (fr) 2022-01-26

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